If that part of the informal FAQ worries you that it might be interpreted in some strange way, just look at the actually license and read it.

Notwithstanding any other provision of this License, if you modify the Program, your modified version must prominently offer all users interacting with it remotely through a computer network (if your version supports such interaction) an opportunity to receive the Corresponding Source of your version

The definition of Corresponding Source code is listed earlier in this HN thread.